15 results about "Isoprenol" patented technology

Provided is a binder including a polymer having a hydroxyl group, wherein the polymer includes a structural unit derived from an unsaturated carboxylic acid-based monomer, and a structural unit derived from at least one hydroxyl group-containing monomer selected from the group consisting of 2-hydroxyethyl acrylate, allyl alcohol, and isoprenol, the content of the structural unit derived from the hydroxyl group-containing monomer is 5 mol % to 50 mol % based on the total amount of the polymer, the weight average molecular weight of the polymer is 1000 to 5000, and the pH is 6.5 or lower.

The invention relates to an isopentenol polyoxyethylene ether defoaming agent and a preparation method thereof, the defoaming agent is mainly prepared from a cross-linked acrylic copolymer emulsion, an alkali swelling thickener, a modified organic silicon defoaming active matter, a pH regulator (NaOH / KOH), an isothiazolinone bactericide, deionized water and the like in proportion, and the defoaming agent has excellent defoaming performance and stability. A specific auxiliary agent is added. The foam problem of an isopentenol polyoxyethylene ether product in downstream application is solved, and the defoaming agent is mainly applied to defoaming of isopentenol polyoxyethylene ether.

The present invention relates to a method for the preparation of 3-methyl-3-butene-1-ol (isoprenol), comprising the steps of preparing isobutylene (also: isobutene, 2-methylpropene) by contacting 3-methylbutan-1-ol (isoamyl alcohol) to a catalyst comprising at least one catalytically active metal and reacting at least one formaldehyde source and the isobutylene obtained in step a-i) to obtain isoprenol. Furthermore, the present invention refers to processes for the preparation of 3-methyl-2-butene-1-ol (prenol), of 3-methyl-3-butenal (isoprenal), of 3-methyl-2-butenal (prenal), and of 3,7-dimethy l-octa-2, 6-dienal (citral) and further downstream products comprising the use of isoprenol of the present invention and the resulting products and product streams.

A process for the preparation of isoprenol comprises the steps of a-i) preparing isobutylene by oxidizing isoamyl alcohol to isovaleric acid, and subjecting the isovaleric acid to oxidative decarboxylation so as to obtain isobutylene; and a-ii) reacting at least one formaldehyde source and the isobutylene obtained in step a-i) to obtain isoprenol. The process allows for providing isobutylene for the preparation of isoprenol and its downstream products, including prenol, prenal, isoprenal and / or 3,7-dimethyl-octa-2,6-dienal (citral), from renewable sources.

DEPCT6916 / 12 / 2568 This invention relates to a process for preparing 3-methyl-2-butenal (prenal) for... Prepare 3-methyl-2-butane-1-ol(prenol), for the preparation of diprenyl acetate of prenol, including for... Preparation of 3,7-dimethyl-octa-2,6-dienal(citral) where the amount of aldehyde in one reactant stream The current, or more precisely, is kept below the triggering value. Furthermore, this invention also involves... The product stream that can be obtained from prenol, prenol diprenyl acetate of prenol including citral;

The invention relates to a process for the preparation of 3-methyl-2-butenal (isopentenal), for the preparation of 3-methyl-2-buten-1-ol (isopentenol), for the preparation of diisopentenyl acetic acid esters for the preparation of isopentenal, and for the preparation of 3, 7-dimethyl-oct-2, 6-dienal (citral), in particular to a process for the preparation of 3, 7-dimethyl-oct-2, 6-dienal. Wherein the aldehyde content in the one or more reactant streams is maintained below a threshold. Furthermore, the present invention relates to product streams of isopentenal, isopentenol, diisopentenyl acetate of isopentenal, and citral, which can be obtained.

This disclosure generally relates to the use of enzyme combinations or recombinant microbes comprising same to make isoprenoid precursors, isoprenoids and derivatives thereof including prenylated aromatic compounds. Novel metabolic pathways exploiting Claisen, aldol, and acyloin condensations are used instead of the natural mevalonate (MVA) pathway or 1-deoxy-d-xylulose 5-phosphate (DXP) pathways for generating isoprenoid precursors such as isopentenyl pyrophosphate (IPP), dimethylallyl pyrophosphate (DMAPP), and geranyl pyrophosphate (GPP). These pathways have the potential for better carbon and or energy efficiency than native pathways. Both decarboxylative and non-carboxylative condensations are utilized, enabling product synthesis from a number of different starting compounds. These condensation reactions serve as a platform for the synthesis of isoprenoid precursors when utilized in combination with a variety of metabolic pathways and enzymes for carbon rearrangement and the addition / removal of functional groups. Isoprenoid alcohols are key intermediary products for the production of isoprenoid precursors in these novel synthetic metabolic pathways. These precursors can be modified to various isoprenoid products through prenyl transferase, terpene synthase, or terpene cyclases. The production of prenylated aromatic compounds is achieved through prenyl transfer of the hydrocarbon units of isoprenoid precursors to polyketides.

The present invention provides for a genetically modified microbial strain capable of growing or dividing in a medium comprising equal to or more than about 4.5 g / L isoprenol, or having an increased tolerance to isoprenol compared to a unmodified microbial strain.

The present invention relates to a method for preparing 4-hydroxy-2-methylene-butanal, 4-hydroxy-2-methyl-but-2-enal and esters thereof of the formula (I.a) and (I.b) where R1 is as defined in the claims and the description, by subjecting isoprenol or an ester thereof to a photooxidation in the presence of a photosensitizer and an acylating agent. The invention relates moreover to certain hydroperoxides of the compounds (I.a) or (I.b), and to the use thereof as intermediates in the synthesis of compounds (I.a) and (I.b) or in the synthesis of retinol, stereoisomers and derivatives thereof.

The present invention relates to a process for preparing prenal and isovaleraldehyde, comprising the steps (a) bringing a gaseous reactant stream comprising isoprenol, isoamyl alcohol and optionally isovaleraldehyde into contact with a silver-containing heterogeneous catalyst in the presence of molecular oxygen to obtain an isoprenal, prenal and isovaleraldehyde containing product stream; (b) separation of isoprenal, prenal and isovaleraldehyde from the product stream; (c) isomerization of isoprenal, contained in the mixture obtained in step b) to prenal; and (d) separation of prenal and isovaleraldehyde from the mixture obtained in step (c). Isovaleraldhyde can be produced simultaneously with prenal and isoprenal in one production facility in high yield and selectivity in an energy efficient manner.

The present invention provides for a method to increase production of isoprenol by a genetically modified Pseudomonas cell, the method comprising: (a) providing a genetically modified Pseudomonas cell comprising one or more of heterologous genes encoding: MvaE, AtoB, MvaS, MK, PMDHKQ, AphA, and PhoA; and (b) culturing or growing the genetically modified Pseudomonas cell in a medium to produce isoprenol; wherein (i) the genetically modified Pseudomonas cell is deleted, knocked out, or reduced in expression of one or more of the following endogenous genes: a gene at PP_2675 locus (or a deletion of the PP_2675 locus), phaABC, mvaB, hbdH, ldhA, gntZ, ppsA, pycAB, gltA, and aceA, and / or (ii) the medium comprises one or more amino acids that reduce the catabolism of isoprenol.

The present invention relates to a method for producing isoprenol in a minimal medium by precisely regulating an isoprenol biosynthesis metabolic pathway and the growth of a strain. Specifically, by producing a recombinant Escherichia coli strain having maximized isoprenol productivity and allowing cultivation thereof in a minimal medium, the present invention enables economically superior production of isoprenol, and thus can be widely applied in the aviation fuel industry where isoprenol is used as a precursor, or in the biofuel industry where isoprenol is used directly.

A process for recovering isoprenol essentially free of formaldehyde from a stream of crude isoprenol containing isoprenol, water and formaldehyde, the process comprising subjecting the stream of crude isoprenol or an isoprenol containing fraction thereof to distillation in a low-boiler separation tower operated at a pressure of 2.5 bara or higher to obtain a distillate stream containing aqueous formaldehyde and a bottoms stream containing isoprenol. The process of the invention allows for obtaining isoprenol essentially free of formaldehyde. Further provided is a plant for recovering isoprenol essentially free of formaldehyde from a stream of crude isoprenol containing isoprenol, water and formaldehyde, the plant comprising a first low-boiler separation tower, a second low-boiler separation tower, and a finishing tower.

The present invention provides for a method for increasing the production of a short chain alcohol, such as isoprenol or a diol, comprising: (a) providing a microbial strain comprising a genetic circuit comprising a short chain alcohol biosensor which allows growth of the microbial strain only when the microbial strain produces the short chain alcohol is produced, (b) screening for a cell with increased short chain alcohol production, and (c) optionally culturing or growing the cell to produce the short chain alcohol.

The present invention belongs to the field of microbial metabolic engineering, and discloses an engineered Saccharomyces cerevisiae strain dependent on the isoprenol utilization pathway, a construction method thereof and an application thereof. The engineered Saccharomyces cerevisiae strain has the following characteristics: the natural mevalonate pathway is inactivated, the 156th amino acid in the PRM10 gene is mutated from leucine to glutamine, and it contains the phosphokinase SmDAGK or its mutant, and the phosphokinase AtIPK or its mutant. The engineered Saccharomyces cerevisiae strain can efficiently express terpenoids synthesized by the isoprenol utilization pathway; compared with the strain directly introducing the isoprenol utilization pathway, the engineered Saccharomyces cerevisiae strain has higher substrate conversion rate and yield, providing a feasible strategy for the efficient synthesis of terpenoids by using an artificial pathway.